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Siviewer.com Redirect

Also Known As: SIViewer browser hijacker
Damage level: Medium

What is siviewer.com?

SIViewer is a deceptive application that supposedly allows users view various images (for example, .jpg, .gif, etc.). Initially, this app may seem legitimate, however, it is classed as a potentially unwanted program (PUP) and a browser hijacker. SIViewer infiltrates systems without users’ permission, gathers various information regarding users' web browsing activity, hijacks Internet browsers, and stealthily modifies browser settings.

siviewer.com browser hijacker

SIViewer assigns the Internet Explorer, Google Chrome, and Mozilla Firefox browser default search engine, homepage, and new tab URL browser settings to start.siviewer.com - a fake Internet search engine. In addition, this browser hijacker adds this URL as an extension to the target of all existing browser shortcuts.

In doing so, SIViewer virtually guarantees successful unwanted browser redirects - users are continually redirected to start.siviewer.com without their consent. This significantly diminishes their web browsing experience.

Note that start.siviewer.com generates various dubious search results and, thus, searching the Internet via this website can result in further adware or malware infections. Another downside of SIViewer is data tracking. This app continually gathers various user/system information including IP addresses, websites visited, pages viewed, search queries, etc.

This data may seem insignificant, however, it might contain personally identifiable details that developers of SIViewer share with third parties (who can misuse private data to generate revenue). This behavior can lead to serious privacy issues. Therefore, you are strongly advised to uninstall SIViewer immediately.

There are dozens of fake Internet search engines that falsely claim to enhance the web browsing experience by generating the most relevant search results.

These claims are merely attempts to give the impression of legitimate software. In fact, PUPs and fake Internet search engines are designed only to generate revenue for the developers -  they simply cause unwanted browser redirects, record private data, and deliver intrusive online advertisements, and provide no significant value for users.

How did siviewer.com install on my computer?

SIViewer has an official download website, however, this app is also promoted using a deceptive software marketing method called 'bundling' (stealth installation of PUPs with regular software). Therefore, many users install SIViewer inadvertently, since they do not express enough caution when downloading and installing software.

Aware of this, developers intentionally hide bogus programs such as SIViewer within the 'Custom/Advanced' settings of these processes. Users who skip this section, often install bogus programs inadvertently.

How to avoid installation of potentially unwanted applications?

To prevent this situation, be cautious when downloading and installing software. Closely analyze each step within the 'Custom/Advanced' settings and opt-out of all additionally-included programs. Bundled software is often dubious and, thus, should never be installed.

Website promoting SIViewer browser hijacker:

Website used to promote SIViewer

SIViewer installer set-up:

Official SIViewer installation setup

Screenshot of SIViewer application:

Potentially unwanted program SIViewer

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Quick menu:

Siviewer.com redirect removal:

Windows 11 users:

Accessing Apps and Features in Windows 11

Right-click on the Start icon, select Apps and Features. In the opened window search for the application you want to uninstall, after locating it, click on the three vertical dots and select Uninstall.

Windows 10 users:

Accessing Programs and Features (uninstall) in Windows 8

Right-click in the lower left corner of the screen, in the Quick Access Menu select Control Panel. In the opened window choose Programs and Features.

Windows 7 users:

Accessing Programs and Features (uninstall) in Windows 7

Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.

macOS (OSX) users:

Uninstall app in OSX (Mac)

Click Finder, in the opened screen select Applications. Drag the app from the Applications folder to the Trash (located in your Dock), then right click the Trash icon and select Empty Trash.

siviewer.com browser hijacker uninstall via Control Panel

In the uninstall programs window: look for "SIViewer(Image Viewer)", select this entry and click "Uninstall" or "Remove".

After uninstalling the potentially unwanted program that causes browser redirects to the siviewer.com website, scan your computer for any remaining unwanted components. To scan your computer, use recommended malware removal software.

Siviewer.com homepage and default Internet search engine removal from Internet browsers:

Video showing how to remove browser hijackers:

Internet Explorer logoRemove malicious add-ons from Internet Explorer:

Remove siviewer.com-related Internet Explorer add-ons:

Removing siviewer.com related Internet Explorer extensions

Click the "gear" icon Internet Explorer options icon (at the top right corner of Internet Explorer), select "Manage Add-ons". Look for any recently-installed suspicious browser extensions, select such entries and click "Remove".

Fix Internet Explorer shortcut target:

Removing siviewer.com from Internet Explorer shortcut target step 1

This browser hijacker changes the "Target" field of the Internet Explorer shortcut. To fix this, locate the shortcut on your Desktop and click the right mouse button over it. In the opened menu, choose "Properties". In the opened window, locate the Target field and eliminate text (hxxp://start.siviewer.com/...), which is entered after "C:\Program Files\Internet Explorer\iexplore.exe".

Removing siviewer.com from Internet Explorer shortcut target step 2

Change your homepage:

Removing siviewer.com from Internet Explorer homepage

Click the "gear" icon Internet Explorer options icon (at the top right corner of Internet Explorer), select "Internet Options", in the opened window remove hxxp://start.siviewer.com and enter your preferred domain, which will open each time you launch Internet Explorer.

Change your default search engine:

Removing siviewer.com from Internet Explorer default search engine

Click the "gear" icon Internet Explorer options icon (at the top right corner of Internet Explorer), select "Manage Add-ons". In the opened window, select "Search Providers", set "Google", "Bing" or any other preferred search engine as your default, then remove "siviewer".

Optional method:

If you continue to have problems with removal of the siviewer browser hijacker, reset your Internet Explorer settings to default.

Windows XP users: Click Start, click Run, in the opened window type inetcpl.cpl In the opened window click the Advanced tab, then click Reset.

Resetting Internet Explorer settings to default on Windows XP

Windows Vista and Windows 7 users: Click the Windows logo, in the start search box type inetcpl.cpl and click enter. In the opened window click the Advanced tab, then click Reset.

Resetting Internet Explorer settings to default on Windows 7

Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.

Reseting Internet Explorer settings to default in Windows 8 - accessing

In the opened window, select the Advanced tab.

Resetting Internet Explorer settings to default on Windows 8 - Internet options advanced tab

Click the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - click the Reset button in the Internet options advanced tab

Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.

Resetting Internet Explorer settings to default on Windows 8 - confirm settings reset to default by clicking the reset button

Google Chrome logoRemove malicious extensions from Google Chrome:

Remove siviewer.com-related Google Chrome extensions:

Removing siviewer.com related Google Chrome extensions

Click the Chrome menu icon Google Chrome options icon (at the top right corner of Google Chrome), select "Tools" and click "Extensions". Locate "SIViewer" and other recently-installed suspicious add-ons, select these entries and click the trash can icon.

Fix Google Chrome shortcut target:

Removing siviewer.com from Google Chrome shortcut target step 1

This browser hijacker modifies the "Target" field of the Google Chrome shortcut. To fix this, locate the shortcut on your Desktop and click the right mouse button over it. In the opened menu, choose "Properties". In the opened window, locate the Target field and eliminate all text (hxxp://www.start.siviewer.com/...), which is entered after "C:\Program Files\Google\Chrome\Application\chrome.exe"

Removing siviewer.com from Google Chrome shortcut target step 2

Change your homepage:

Removing siviewer.com from Google Chrome homepage

Click the Chrome menu icon Google Chrome options icon (at the top right corner of Google Chrome), select "Settings". In the "On startup" section, click "set pages", hover your mouse over hxxp://start.siviewer.com and click the x symbol. Now, you can add your preferred website as your homepage.

Change your default search engine:

Removing siviewer.com from Google Chrome default search engine

To change your default search engine in Google Chrome: Click the Chrome menu icon Google Chrome options icon (at the top right corner of Google Chrome), select "Settings", in "Search" section, click "Manage Search Engines...", remove "siviewer" and add or select your preferred Internet search engine.

Optional method:

If you continue to have problems with removal of the siviewer browser hijacker, reset your Google Chrome browser settings. Click the Chrome menu icon Google Chrome menu icon (at the top right corner of Google Chrome) and select Settings. Scroll down to the bottom of the screen. Click the Advanced… link.

Google Chrome settings reset step 1

After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.

Google Chrome settings reset step 2

In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.

Google Chrome settings reset step 3

Mozilla Firefox logoRemove malicious plugins from Mozilla Firefox:

Remove siviewer.com-related Mozilla Firefox add-ons:

Removing siviewer.com related Mozilla Firefox extensions

Click the Firefox menu firefox menu icon (at the top right corner of the main window), select "Add-ons". Click on "Extensions", in the opened window, remove any recently-installed suspicious browser plug-ins.

Fix Mozilla Firefox shortcut target:

Removing siviewer.com from Mozilla Firefox shortcut target step 1

This browser hijacker changes the "Target" field of the Mozilla Firefox shortcut. To fix this, locate the shortcut on your Desktop and click the right mouse button over it. In the opened menu, choose "Properties". In the opened window, locate the Target field and eliminate all text (hxxp://start.siviewer.com/...), which is entered after "C:\Program Files\Mozilla Firefox\firefox.exe"

Removing siviewer.com from Mozilla Firefox shortcut target step 2

Change your homepage:

Removing siviewer.com from Mozilla Firefox homepage

To reset your homepage, click the Firefox menu firefox menu icon (at the top right corner of the main window) then select "Options", in the opened window, remove hxxp://www.siviewer.com and enter your preferred domain, which will open each time you start Mozilla Firefox.

Change default search engine:

Removing siviewer.com from Mozilla Firefox default search engine

In the URL address bar, type about:config and press Enter.
Click "I'll be careful, I promise!".
In the search filter at the top, type: "siviewer.com"
Right-click on the found preferences and select "Reset" to restore default values.

Optional method:

Computer users who have problems with siviewer browser hijacker removal can reset their Mozilla Firefox settings.

Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, firefox menu icon in the opened menu, click Help.

Accessing settings (Reset Firefox to default settings step 1)

Select Troubleshooting Information.

Accessing Troubleshooting Information (Reset Firefox to default settings step 2)

In the opened window, click the Refresh Firefox button.

Clicking on Refresh Firefox button (Reset Firefox to default settings step 3)

In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.

Confirm your want to reset Firefox settings to default (Reset Firefox to default settings step 4)

safari browser logoRemove malicious extensions from Safari:

Removing browser hijackers from safari step 1 - accessing preferences

Make sure your Safari browser is active and click Safari menu, then select Preferences...

removing browser hijacker from safari step 2 - removing extensions

In the preferences window select the Extensions tab. Look for any recently installed suspicious extensions and uninstall them.

Removing browser hijackers from safari step 3 - changing homepage

In the preferences window select General tab and make sure that your homepage is set to a preferred URL, if its altered by a browser hijacker - change it.

removing browser hijackers from safari step 4 - changing the default Internet search engine

In the preferences window select Search tab and make sure that your preferred Internet search engine is selected.

Optional method:

Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...

resetting safari step 1

In the opened window select all history and click the Clear History button.

resetting safari step 2

Microsoft Edge (Chromium) logoRemove malicious extensions from Microsoft Edge:

Removing browser hijackers from Microsoft Edge step 1

Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge), select "Extensions". Locate any recently-installed suspicious browser add-ons, and remove them.

Change your homepage and new tab settings:

Removing browser hijackers from Microsoft Edge step 2

Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge), select "Settings". In the "On startup" section look for the name of the browser hijacker and click "Disable".

Change your default Internet search engine:

Removing browser hijackers from Microsoft Edge step 3

To change your default search engine in Microsoft Edge: Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge), select "Privacy and services", scroll to bottom of the page and select "Address bar". In the "Search engines used in address bar" section look for the name of the unwanted Internet search engine, when located click the "Disable" button near it. Alternatively you can click on "Manage search engines", in the opened menu look for unwanted Internet search engine. Click on the puzzle icon Microsoft Edge (Chromium) puzzle icon near it and select "Disable".

Optional method:

If you continue to have problems with removal of the siviewer browser hijacker, reset your Microsoft Edge browser settings. Click the Edge menu icon Microsoft Edge (chromium) menu icon (at the top right corner of Microsoft Edge) and select Settings.

Microsoft Edge (Chromium) reset step 1

In the opened settings menu select Reset settings.

Microsoft Edge (Chromium) reset step 2

Select Restore settings to their default values. In the opened window, confirm that you wish to reset Microsoft Edge settings to default by clicking the Reset button.

Microsoft Edge (Chromium) reset step 3

  • If this did not help, follow these alternative instructions explaining how to reset the Microsoft Edge browser.

Summary:

declining installation of browser hijackers while downloading free software sampleA browser hijacker is a type of adware infection that modifies Internet browser settings by assigning the homepage and default Internet search engine settings to some other (unwanted) website URL. Commonly, this type of adware infiltrates operating systems through free software downloads. If your download is managed by a download client, ensure that you decline offers to install advertised toolbars or applications that seek to change your homepage and default Internet search engine settings.

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About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

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Software uninstall instructions
Malware activity

Global malware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
SIViewer browser hijacker QR code
Scan this QR code to have an easy access removal guide of SIViewer browser hijacker on your mobile device.
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